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STOCKHOLDERS' DEFICIT - PREFERRED STOCK (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2017 | Sep. 30, 2017
Class of Stock [Line Items] |  |
Dividends preferred stock |  | $ 0.2
Subsequent Event | Class A common stock |  |
Class of Stock [Line Items] |  |
Preferred stock dividends (shares) | 60,133 |

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- Definition Aggregate amount of cumulative preferred dividends in arrears. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21488-112644 + Details
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